Lens module

ABSTRACT

A lens module may include a first lens having positive refractive power; a second lens having positive refractive power; a third lens having negative refractive power; a fourth lens having refractive power; a fifth lens having refractive power; a sixth lens having negative refractive power; and a seventh lens having refractive power and one or more inflection points formed in locations thereof not crossing an optical axis, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are disposed in a sequential order from the first lens to the seventh lens.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No.14/328,681 filed on Jul. 10, 2014, which claims the benefit of KoreanPatent Application No. 10-2014-0036968 filed on Mar. 28, 2014, with theKorean Intellectual Property Office, the disclosure of which isincorporated in its entirety herein by reference.

BACKGROUND

The present disclosure relates to a lens module.

Recent portable terminals have included a camera so that video calls andphotography are possible. In addition, as the functionality of camerasin portable terminals has gradually increased, cameras for portableterminals have gradually been required to have high resolution and highperformance.

However, since there is a trend for portable terminals to beminiaturized and be lightened, there may be limitations in implementingcameras having high resolution and high performance.

In order to solve these problems, recently, lenses of cameras have beenformed of plastic, a material lighter than glass, and lens modules havebeen configured using five or more lenses in order to implement highresolution.

However, it is more difficult to improve chromatic aberration and toimplement a relatively bright optical system in the lenses formed ofplastic as compared to lenses formed of glass.

SUMMARY

Some embodiments of the present disclosure may provide a lens modulecapable of improving an aberration improvement effect and implementinghigh resolution.

According to some embodiments of the present disclosure, a lens modulemay include: a first lens having positive refractive power; a secondlens having positive refractive power; a third lens having negativerefractive power; a fourth lens having refractive power; a fifth lenshaving refractive power; a sixth lens having negative refractive power;and a seventh lens having refractive power and one or more inflectionpoints formed in locations thereof not crossing an optical axis.

The fourth lens may have negative refractive power.

The fifth lens may have positive refractive power.

The seventh lens may have negative refractive power.

An object-side surface of the first lens may be convex, and animage-side surface thereof may be concave.

Both surfaces of the second lens may be convex.

An object-side surface of the third lens may be convex, and animage-side surface thereof may be concave.

An image-side surface of the fifth lens may be convex.

An object-side surface of the sixth lens may be concave, and animage-side surface thereof may be convex.

An object-side surface of the seventh lens may be convex, and animage-side surface thereof may be concave.

The lens module as described above may satisfy the following ConditionalEquation:

V1−V3>20  [Conditional Equation]

where V1 is an Abbe number of the first lens, and V3 is an Abbe numberof the third lens.

The lens module as described above may satisfy the following ConditionalEquation:

V2−V3>20  [Conditional Equation]

where V2 is an Abbe number of the second lens, and V3 is an Abbe numberof the third lens.

The lens module as described above may satisfy the following ConditionalEquation:

(V1+V2)/2−V3>20  [Conditional Equation]

where V1 is an Abbe number of the first lens, V2 is an Abbe number ofthe second lens, and V3 is an Abbe number of the third lens.

The lens module as described above may satisfy the following ConditionalEquation:

f1>f2  [Conditional Equation]

where f1 is a focal length of the first lens, and f2 is a focal lengthof the second lens.

The lens module as described above may satisfy the following ConditionalEquation:

D12>D23  [Conditional Equation]

where D12 is a distance from an image-side surface of the first lens toan object-side surface of the second lens, and D23 is a distance from animage-side surface of the second lens to an object-side surface of thethird lens.

According to some embodiments of the present disclosure, a lens modulemay include: a first lens having positive refractive power; a secondlens having positive refractive power; a third lens having negativerefractive power; a fourth lens having refractive power; a fifth lenshaving refractive power; a sixth lens having positive refractive power;and a seventh lens having refractive power and one or more inflectionpoints formed in locations thereof not crossing an optical axis.

The fourth lens may have negative refractive power.

The seventh lens may have negative refractive power.

An object-side surface of the first lens may be convex, and animage-side surface thereof may be concave.

Both surfaces of the second lens may be convex.

An image-side surface of the third lens may be concave.

An object-side surface of the sixth lens may be concave, and animage-side surface thereof may be convex.

An object-side surface of the seventh lens may be convex, and animage-side surface thereof may be concave.

The lens module as described above may satisfy the following ConditionalEquation:

V1−V3>20  [Conditional Equation]

where V1 is an Abbe number of the first lens, and V3 is an Abbe numberof the third lens.

The lens module as described above may satisfy the following ConditionalEquation:

V2−V3>20  [Conditional Equation]

where V2 is an Abbe number of the second lens, and V3 is an Abbe numberof the third lens.

The lens module as described above may satisfy the following ConditionalEquation:

(V1+V2)/2−V3>20  [Conditional Equation]

where V1 is an Abbe number of the first lens, V2 is an Abbe number ofthe second lens, and V3 is an Abbe number of the third lens.

The lens module as described above may satisfy the following ConditionalEquation:

f1>f2  [Conditional Equation]

where f1 is a focal length of the first lens, and f2 is a focal lengthof the second lens.

The lens module as described above may satisfy the following ConditionalEquation:

D12>D23  [Conditional Equation]

where D12 is a distance from an image-side surface of the first lens toan object-side surface of the second lens, and D23 is a distance from animage-side surface of the second lens to an object-side surface of thethird lens.

According to some embodiments of the present disclosure, a lens modulemay include: a first lens having positive refractive power; a secondlens having positive refractive power; a third lens having negativerefractive power; a fourth lens having positive refractive power; afifth lens having positive refractive power; a sixth lens havingnegative refractive power; and a seventh lens having negative refractivepower and one or more inflection points formed in locations thereof notcrossing an optical axis.

BRIEF DESCRIPTION OF DRAWINGS

The above and other aspects, features and other advantages of thepresent disclosure will be more clearly understood from the followingdetailed description taken in conjunction with the accompanyingdrawings, in which:

FIG. 1 is a configuration diagram of a lens module according to a firstexemplary embodiment of the present disclosure;

FIG. 2 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 1;

FIG. 3 is a table illustrating lens characteristics of the lens moduleshown in FIG. 1;

FIG. 4 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 1;

FIG. 5 is a configuration diagram of a lens module according to a secondexemplary embodiment of the present disclosure;

FIG. 6 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 5;

FIG. 7 is a table illustrating lens characteristics of the lens moduleshown in FIG. 5;

FIG. 8 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 5;

FIG. 9 is a configuration diagram of a lens module according to a thirdexemplary embodiment of the present disclosure;

FIG. 10 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 9;

FIG. 11 is a table illustrating lens characteristics of the lens moduleshown in FIG. 9;

FIG. 12 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 9;

FIG. 13 is a configuration diagram of a lens module according to afourth exemplary embodiment of the present disclosure;

FIG. 14 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 13;

FIG. 15 is a table illustrating lens characteristics of the lens moduleshown in FIG. 13;

FIG. 16 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 13;

FIG. 17 is a configuration diagram of a lens module according to a fifthexemplary embodiment of the present disclosure;

FIG. 18 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 17;

FIG. 19 is a table illustrating lens characteristics of the lens moduleshown in FIG. 17;

FIG. 20 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 17;

FIG. 21 is a configuration diagram of a lens module according to a sixthexemplary embodiment of the present disclosure;

FIG. 22 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 21;

FIG. 23 is a table illustrating lens characteristics of the lens moduleshown in FIG. 21;

FIG. 24 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 21;

FIG. 25 is a configuration diagram of a lens module according to aseventh exemplary embodiment of the present disclosure;

FIG. 26 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 25;

FIG. 27 is a table illustrating lens characteristics of the lens moduleshown in FIG. 25;

FIG. 28 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 25;

FIG. 29 is a configuration diagram of a lens module according to aneighth exemplary embodiment of the present disclosure;

FIG. 30 is a curve illustrating optical characteristics of the lensmodule shown in FIG. 29;

FIG. 31 is a table illustrating lens characteristics of the lens moduleshown in FIG. 29; and

FIG. 32 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 29.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present disclosure will be described indetail with reference to the accompanying drawings. The disclosure may,however, be embodied in many different forms and should not be construedas being limited to the embodiments set forth herein. Rather, theseembodiments are provided so that this disclosure will be thorough andcomplete, and will fully convey the scope of the disclosure to thoseskilled in the art. In the drawings, the shapes and dimensions ofelements may be exaggerated for clarity, and the same reference numeralswill be used throughout to designate the same or like elements.

In addition, it is to be noted that in the present specification, afirst lens refers to a lens closest to an object side and a seventh lensrefers to a lens closest to an image side. Further, it is to be notedthat the term ‘front’ refers to a direction from the lens module towardthe object side, while the term ‘rear’ refers to a direction from thelens module toward an image sensor or the image side. In addition, it isto be noted that a first surface of each lens refers to a surface closeto the object side (or an object-side surface) and a second surface ofeach lens refers to a surface close to the image side (or an image-sidesurface). Further, in the present specification, unless particularlydescribed, units of all of radii of curvature, thicknesses, TTLs, BFLs,D12, D23, and focal lengths (f, f1, f2, f3, f4, f5, f6, f7, and f12) ofthe lenses may be mm. In addition, the thickness of the lens, intervalsbetween the lenses, TTL (or OAL), SL, BFL, D12, and D23 are distancesmeasured based on an optical axis of the lens. Further, in descriptionsof lens shapes, the meaning of one surface of the lens being convex isthat an optical axis portion of a corresponding surface is convex, andthe meaning of one surface of the lens being concave is that an opticalaxis portion of a corresponding portion is concave. Therefore, althoughit is described that one surface of the lens is convex, an edge portionof the lens may be concave. Likewise, although it is described that onesurface of the lens is concave, an edge portion of the lens may beconvex. In addition, in the following detailed description and claims,the term “inflection point” refers to a point at which a radius ofcurvature is changed in a portion not crossing the optical axis. Inaddition, in the following detailed description and claims, the term“turning point” refers to a point at which the surface is convex orconcave in a portion that does not cross the optical axis.

FIG. 1 is a configuration diagram of a lens module according to a firstexemplary embodiment of the present disclosure; FIG. 2 is a curveillustrating optical characteristics of the lens module shown in FIG. 1;FIG. 3 is a table illustrating lens characteristics of the lens moduleshown in FIG. 1; FIG. 4 is a table illustrating aspherical surfacecoefficients of the lens module shown in FIG. 1; FIG. 5 is aconfiguration diagram of a lens module according to a second exemplaryembodiment of the present disclosure; FIG. 6 is a curve illustratingoptical characteristics of the lens module shown in FIG. 5; FIG. 7 is atable illustrating lens characteristics of the lens module shown in FIG.5; FIG. 8 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 5; FIG. 9 is a configuration diagram of a lensmodule according to a third exemplary embodiment of the presentdisclosure; FIG. 10 is a curve illustrating optical characteristics ofthe lens module shown in FIG. 9; FIG. 11 is a table illustrating lenscharacteristics of the lens module shown in FIG. 9; FIG. 12 is a tableillustrating aspherical surface coefficients of the lens module shown inFIG. 9; FIG. 13 is a configuration diagram of a lens module according toa fourth exemplary embodiment of the present disclosure; FIG. 14 is acurve illustrating optical characteristics of the lens module shown inFIG. 13; FIG. 15 is a table illustrating lens characteristics of thelens module shown in FIG. 13; FIG. 16 is a table illustrating asphericalsurface coefficients of the lens module shown in FIG. 13; FIG. 17 is aconfiguration diagram of a lens module according to a fifth exemplaryembodiment of the present disclosure; FIG. 18 is a curve illustratingoptical characteristics of the lens module shown in FIG. 17; FIG. 19 isa table illustrating lens characteristics of the lens module shown inFIG. 17; FIG. 20 is a table illustrating aspherical surface coefficientsof the lens module shown in FIG. 17; FIG. 21 is a configuration diagramof a lens module according to a sixth exemplary embodiment of thepresent disclosure; FIG. 22 is a curve illustrating opticalcharacteristics of the lens module shown in FIG. 21; FIG. 23 is a tableillustrating lens characteristics of the lens module shown in FIG. 21;FIG. 24 is a table illustrating aspherical surface coefficients of thelens module shown in FIG. 21; FIG. 25 is a configuration diagram of alens module according to a seventh exemplary embodiment of the presentdisclosure; FIG. 26 is a curve illustrating optical characteristics ofthe lens module shown in FIG. 25; FIG. 27 is a table illustrating lenscharacteristics of the lens module shown in FIG. 25; FIG. 28 is a tableillustrating aspherical surface coefficients of the lens module shown inFIG. 25; FIG. 29 is a configuration diagram of a lens module accordingto an eighth exemplary embodiment of the present disclosure; FIG. 30 isa curve illustrating optical characteristics of the lens module shown inFIG. 29; FIG. 31 is a table illustrating lens characteristics of thelens module shown in FIG. 29; and FIG. 32 is a table illustratingaspherical surface coefficients of the lens module shown in FIG. 29.

A lens module according to the present disclosure may include an opticalsystem including seven lenses. In detail, the lens module may include afirst lens, a second lens, a third lens, a fourth lens, a fifth lens, asixth lens, and a seventh lens. However, the lens module is not limitedto only including seven lenses, but may further include other componentsif necessary. For example, the lens module may include a stop forcontrolling an amount of light. In addition, the lens module may furtherinclude an infrared cut-off filter cutting off infrared light. Further,the lens module may further include an image sensor (that is, an imagingdevice) converting an image of a subject incident through the opticalsystem into an electrical signal. Further, the lens module may furtherinclude an interval maintaining member adjusting an interval betweenlenses.

At least one of the first to seventh lenses may be formed of plastic.For example, the first and seventh lenses are formed of plastic, and theother lenses may be formed of a different material. However, thematerials of the first to third lenses are not limited thereto. Forexample, all of the first to seventh lenses may be formed of plastic.

At least one of an object-side surface and an image-side surface of atleast one of the first to seventh lenses may be aspherical. For example,the object-side surface or the image-side surface of the first toseventh lenses may be aspherical. As another example, both of theobject-side surface and the image-side surface of the first to seventhlenses may be aspherical.

The lens module according to an exemplary embodiment of the presentdisclosure may satisfy the following Conditional Equation.

V1−V3>20  [Conditional Equation]

Here, V1 is an Abbe number of the first lens, and V3 is an Abbe numberof the third lens. The above Conditional Equation may indicate acondition for optimizing the manufacturing of the third lens. Forexample, since the third lens satisfying the above Conditional Equationmay generally have a high refractive index, it may be easy tomanufacture the third lens. In addition, since the third lens satisfyingthe above Conditional Equation may generally have a large radius ofcurvature, sensitivity to tolerance may be small.

The lens module according to an exemplary embodiment of the presentdisclosure may satisfy the following Conditional Equation.

V2−V3>20  [Conditional Equation]

Here, V2 is an Abbe number of the second lens, and V3 is the Abbe numberof the third lens. The above Conditional Equation may indicate acondition for optimizing the manufacturing of the third lens, similarlyto previous Conditional Equation. For example, since the third lenssatisfying the above Conditional Equation may generally have a highrefractive index, it may be easy to manufacture the third lens. Inaddition, since the third lens satisfying the above Conditional Equationmay generally have a large radius of curvature, sensitivity to tolerancemay be small.

The lens module according to an exemplary embodiment of the presentdisclosure may satisfy the following Conditional Equation.

(V1+V2)/2−V3>20  [Conditional Equation]

Here, V1 is the Abbe number of the first lens, V2 is the Abbe number ofthe second lens, and V3 is the Abbe number of the third lens. The aboveConditional Equation may indicate a condition for optimizing a materialof the third lens with respect to the first and second lenses. Forexample, the first to third lenses satisfying the above ConditionalEquation may effectively correct longitudinal chromatic aberration.

The lens module according to an exemplary embodiment of the presentdisclosure may satisfy the following Conditional Equation.

f1>f2  [Conditional Equation]

Here, f1 is a focal length of the first lens, and f2 is a focal lengthof the second lens. The above Conditional Equation may indicate acondition for optimizing the manufacturing of the first lens. Forexample, since the first lens satisfying the above Conditional Equationmay generally have a low refractive index, the first lens may beinsensitive to tolerance, such that it may be easy to manufacture thefirst lens.

The lens module according to an exemplary embodiment of the presentdisclosure may satisfy the following Conditional Equation.

D12>D23  [Conditional Equation]

Here, D12 is a distance from an image-side surface of the first lens toan object-side surface of the second lens, and D23 is a distance from animage-side surface of the second lens to an object-side surface of thethird lens.

The lens module according to an exemplary embodiment of the presentdisclosure may include one or more aspherical lenses. For example, oneor more of the first to seventh lenses may be the aspherical lens. As anexample, both surfaces of the first to third lenses may be aspherical.For reference, an aspherical surface of each lens may be represented byEquation 1.

$\begin{matrix}{Z = {\frac{{cr}^{2}}{1 + \sqrt{1 - {\left( {1 + k} \right)c^{2}r^{2}}}} + {Ar}^{4} + {Br}^{6} + {Cr}^{8} + {Dr}^{10} + {Er}^{12} + {Fr}^{14} + {Gr}^{16} + {Hr}^{18} + {Jr}^{20}}} & \left\lbrack {{Equation}\mspace{14mu} 1} \right\rbrack\end{matrix}$

In Equation 1, c indicates curvature (1/r), k indicates a conicconstant, and r indicates a radius of curvature. In addition, constantsA to J sequentially indicate 4-th order to 20-th order asphericalcoefficients. Further, Z indicates a sag at a specific position.

Hereinafter, the first to seventh lenses of the lens module according toan exemplary embodiment of the present disclosure will be described.

The first lens may have refractive power. For example, the first lensmay have positive refractive power. The first lens may be formed ofplastic. However, a material of the first lens is not limited to theplastic. For example, the first lens may be formed of another materialas long as the material may transmit light. An object-side surface ofthe first lens may be convex, and an image-side surface thereof may beconcave. For example, the first lens may have a meniscus shape in whichit is convex toward an object side or a plano-convex shape in which onesurface thereof is convex. At least one of the object-side surface andthe image-side surface of the first lens may be aspherical. For example,the object-side surface or the image-side surface of the first lens maybe aspherical. In addition, both surfaces of the first lens may beaspherical.

The second lens may have refractive power. For example, the second lensmay have positive refractive power. The second lens may be formed ofplastic. However, a material of the second lens is not limited to theplastic. For example, the second lens may be formed of another materialas long as the material may transmit light. Both surfaces of the secondlens may be convex. At least one of an object-side surface and animage-side surface of the second lens may be aspherical. For example,the object-side surface or the image-side surface of the second lens maybe aspherical. In addition, both surfaces of the second lens may beaspherical.

The third lens may have refractive power. For example, the third lensmay have negative refractive power. The third lens may be formed ofplastic. However, a material of the third lens is not limited to theplastic. For example, the third lens may be formed of another materialas long as the material may transmit light. Meanwhile, the third lensmay be formed of a material having a high refractive index. For example,the third lens may be formed of a material having a refractive index of1.6 or more and an Abbe number of 30 or less. The third lens satisfyingthe condition as described above may be easily manufactured and beinsensitive to tolerance. An object-side surface of the third lens maybe convex, and an image-side surface thereof may be concave. However, ashape of the third lens is not limited thereto. For example, theobject-side surface of the third lens may be concave and the image-sidesurface thereof may be concave. At least one of the object-side surfaceand the image-side surface of the third lens may be aspherical. Forexample, the object-side surface or the image-side surface of the thirdlens may be aspherical. In addition, both surfaces of the third lens maybe aspherical.

The fourth lens may have refractive power. For example, the fourth lensmay have positive or negative refractive power. The fourth lens may beformed of plastic. However, a material of the fourth lens is not limitedto the plastic. For example, the fourth lens may be formed of anothermaterial as long as the material may transmit light. Meanwhile, thefourth lens may be formed of a material having a high refractive index.For example, the fourth lens may be formed of a material having arefractive index of 1.6 or more and an Abbe number of 30 or less. Thefourth lens satisfying the condition as described above may be easilymanufactured and be insensitive to tolerance. An object-side surface ofthe fourth lens may be convex, and an image-side surface thereof may beconcave. However, a shape of the fourth lens is not limited to thereto.For example, the object-side surface of the fourth lens may be concaveand the image-side surface thereof may be convex. At least one of theobject-side surface and the image-side surface of the fourth lens may beaspherical. For example, the object-side surface or the image-sidesurface of the fourth lens may be aspherical. In addition, both surfacesof the fourth lens may be aspherical.

The fifth lens may have refractive power. For example, the fifth lensmay have positive or negative refractive power. The fifth lens may beformed of plastic. However, a material of the fifth lens is not limitedto the plastic. For example, the fifth lens may be formed of anothermaterial as long as the material may transmit light. Meanwhile, thefifth lens may be formed of a material having a high refractive index.For example, the fifth lens may be formed of a material having arefractive index of 1.6 or more and an Abbe number of 30 or less. Thefifth lens satisfying the condition as described above may be easilymanufactured and be insensitive to tolerance. However, the material ofthe fifth lens is not limited thereto. For example, the fifth lens mayhave a refractive index of 1.6 or less and an Abbe number of 50 or moreif necessary. An object-side surface of the fifth lens may be concave,and an image-side surface thereof may be convex. For example, the fifthlens may have a meniscus shape in which it is convex toward an imageside. However, a shape of the fifth lens is not limited thereto. Forexample, the fifth lens may have a shape in which both surfaces thereofare convex or concave or a shape in which the object-side surfacethereof is convex and the image-side surface thereof is concave. Atleast one of the object-side surface and the image-side surface of thefifth lens may be aspherical. For example, the object-side surface orthe image-side surface of the fifth lens may be aspherical. In addition,both surfaces of the fifth lens may be aspherical.

The sixth lens may have refractive power. For example, the sixth lensmay have positive or negative refractive power. The sixth lens may beformed of plastic. However, a material of the sixth lens is not limitedto the plastic. For example, the sixth lens may be formed of anothermaterial as long as the material may transmit light. Meanwhile, thesixth lens may be formed of a material having a high refractive index.For example, the sixth lens may be formed of a material having arefractive index of 1.6 or more and an Abbe number of 30 or less. Thesixth lens satisfying the condition as described above may be easilymanufactured and be insensitive to tolerance. An object-side surface ofthe sixth lens may be concave, and an image-side surface thereof may beconvex. For example, the sixth lens may have a meniscus shape in whichit is convex toward the image side. At least one of the object-sidesurface and the image-side surface of the sixth lens may be aspherical.For example, the object-side surface or the image-side surface of thesixth lens may be aspherical. In addition, both surfaces of the sixthlens may be aspherical.

The seventh lens may have refractive power. For example, the seventhlens may have negative refractive power. The seventh lens may be formedof plastic. However, a material of the seventh lens is not limited tothe plastic. For example, the seventh lens may be formed of anothermaterial as long as the material may transmit light. An object-sidesurface of the seventh lens may be convex, and an image-side surfacethereof may be concave. In addition, the seventh lens may have a shapein which an inflection point is formed on at least one of theobject-side surface and the image-side surface thereof. For example, theimage-side surface of the seventh lens may be concave at the center ofan optical axis and become convex toward an edge thereof. At least oneof the object-side surface and the image-side surface of the seventhlens may be aspherical. For example, the object-side surface or theimage-side surface of the seventh lens may be aspherical. In addition,both surfaces of the seventh lens may be aspherical.

The lens module configured as described above may significantly decreaseaberration causing image quality deterioration and improve resolution.Further, the lens module configured as described above may be easy forlightness and be advantageous for decreasing a manufacturing cost.

Hereinafter, the lens modules according to first to eighth exemplaryembodiments of the present disclosure will be described.

First, the lens module according to a first exemplary embodiment of thepresent disclosure will be described with reference to FIGS. 1 through4.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 2.

FIG. 3 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 4 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 4, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be convex,and the image-side surface thereof may be concave. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an objectside. The fifth lens 50 may have positive refractive power. In addition,the object-side surface of the fifth lens 50 may be concave, and theimage-side surface thereof may be convex. That is, the fifth lens 50 mayhave a meniscus shape in which it is convex toward an image side. Thesixth lens 60 may have negative refractive power. In addition, theobject-side surface of the sixth lens 60 may be concave, and theimage-side surface thereof may be convex. That is, the sixth lens mayhave a meniscus shape in which it is convex toward the image side. Theseventh lens 70 may have negative refractive power. In addition, theobject-side surface of the seventh lens 70 may be convex, and theimage-side surface thereof may be concave. Further, the seventh lens 70may have a shape in which an inflection point is formed on theobject-side surface and the image-side surface thereof.

Hereinafter, the lens module according to a second exemplary embodimentof the present disclosure will be described with reference to FIGS. 5through 8.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 6.

FIG. 7 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 8 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 8, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be concave, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be convex,and the image-side surface thereof may be concave. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an objectside. The fifth lens 50 may have negative refractive power. In addition,the object-side surface of the fifth lens 50 may be convex, and theimage-side surface thereof may be concave. That is, the fifth lens 50may have a meniscus shape in which it is convex toward the object side.The sixth lens 60 may have positive refractive power. In addition, theobject-side surface of the sixth lens 60 may be concave, and theimage-side surface thereof may be convex. That is, the sixth lens mayhave a meniscus shape in which it is convex toward an image side. Theseventh lens 70 may have negative refractive power. In addition, theobject-side surface of the seventh lens 70 may be convex, and theimage-side surface thereof may be concave. Further, the seventh lens 70may have a shape in which an inflection point is formed on theobject-side surface and the image-side surface thereof.

Hereinafter, the lens module according to a third exemplary embodimentof the present disclosure will be described with reference to FIGS. 9through 12.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 10.

FIG. 11 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 12 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 12, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be concave,and the image-side surface thereof may be convex. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an imageside. The fifth lens 50 may have positive refractive power. In addition,the object-side surface of the fifth lens 50 may be concave, and theimage-side surface thereof may be convex. That is, the fifth lens 50 mayhave a meniscus shape in which it is convex toward the image side. Thesixth lens 60 may have negative refractive power. In addition, theobject-side surface of the sixth lens 60 may be concave, and theimage-side surface thereof may be convex. That is, the sixth lens mayhave a meniscus shape in which it is convex toward the image side. Theseventh lens 70 may have negative refractive power. In addition, theobject-side surface of the seventh lens 70 may be convex, and theimage-side surface thereof may be concave. Further, the seventh lens 70may have a shape in which an inflection point is formed on theobject-side surface and the image-side surface thereof.

Hereinafter, the lens module according to a fourth exemplary embodimentof the present disclosure will be described with reference to FIGS. 13through 16.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 14.

FIG. 15 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 16 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 16, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be convex,and the image-side surface thereof may be concave. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an objectside. The fifth lens 50 may have positive refractive power. In addition,the object-side surface of the fifth lens 50 may be concave, and theimage-side surface thereof may be convex. That is, the fifth lens 50 mayhave a meniscus shape in which it is convex toward an image side. Thesixth lens 60 may have positive refractive power. In addition, theobject-side surface of the sixth lens 60 may be concave, and theimage-side surface thereof may be convex. That is, the sixth lens mayhave a meniscus shape in which it is convex toward the image side. Theseventh lens 70 may have negative refractive power. In addition, theobject-side surface of the seventh lens 70 may be convex, and theimage-side surface thereof may be concave. Further, the seventh lens 70may have a shape in which an inflection point is formed on theobject-side surface and the image-side surface thereof.

Hereinafter, the lens module according to a fifth exemplary embodimentof the present disclosure will be described with reference to FIGS. 17through 20.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 18.

FIG. 19 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 20 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 20, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, S5 to S14 in thevertical axis indicate object-side surfaces and image-side surfaces ofthe third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be concave,and the image-side surface thereof may be convex. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an imageside. The fifth lens 50 may have positive refractive power. In addition,the object-side surface of the fifth lens 50 may be concave, and theimage-side surface thereof may be convex. That is, the fifth lens 50 mayhave a meniscus shape in which it is convex toward the image side. Thesixth lens 60 may have positive refractive power. In addition, theobject-side surface of the sixth lens 60 may be concave, and theimage-side surface thereof may be convex. That is, the sixth lens mayhave a meniscus shape in which it is convex toward the image side. Theseventh lens 70 may have negative refractive power. In addition, theobject-side surface of the seventh lens 70 may be convex, and theimage-side surface thereof may be concave. Further, the seventh lens 70may have a shape in which an inflection point is formed on theobject-side surface and the image-side surface thereof.

Hereinafter, the lens module according to a sixth exemplary embodimentof the present disclosure will be described with reference to FIGS. 21through 24.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 22.

FIG. 23 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 24 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 24, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be convex,and the image-side surface thereof may be concave. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an objectside. The fifth lens 50 may have negative refractive power. In addition,the object-side surface of the fifth lens 50 may be concave, and theimage-side surface thereof may be concave. In addition, both surfaces ofthe fifth lens 50 may be concave. The sixth lens 60 may have positiverefractive power. In addition, the object-side surface of the sixth lens60 may be concave, and the image-side surface thereof may be convex.That is, the sixth lens may have a meniscus shape in which it is convextoward an image side. The seventh lens 70 may have negative refractivepower. In addition, the object-side surface of the seventh lens 70 maybe convex, and the image-side surface thereof may be concave. Further,the seventh lens 70 may have a shape in which an inflection point isformed on the object-side surface and the image-side surface thereof.

Hereinafter, the lens module according to a seventh exemplary embodimentof the present disclosure will be described with reference to FIGS. 25through 28.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 26.

FIG. 27 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 28 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 28, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have negative refractive power. Inaddition, the object-side surface of the fourth lens 40 may be concave,and the image-side surface thereof may be convex. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an imageside. The fifth lens 50 may have positive refractive power. In addition,the object-side surface of the fifth lens 50 may be convex, and theimage-side surface thereof may be convex. In addition, both surfaces ofthe fifth lens 50 may be convex. The sixth lens 60 may have negativerefractive power. In addition, the object-side surface of the sixth lens60 may be concave, and the image-side surface thereof may be convex.That is, the sixth lens may have a meniscus shape in which it is convextoward the image side. The seventh lens 70 may have negative refractivepower. In addition, the object-side surface of the seventh lens 70 maybe convex, and the image-side surface thereof may be concave. Further,the seventh lens 70 may have a shape in which an inflection point isformed on the object-side surface and the image-side surface thereof.

Hereinafter, the lens module according to an eighth exemplary embodimentof the present disclosure will be described with reference to FIGS. 29through 32.

The lens module 100 according to the present exemplary embodiment mayinclude a first lens 10, a second lens 20, a third lens 30, a fourthlens 40, a fifth lens 50, a sixth lens 60, and a seventh lens 70. Inaddition, the lens module 100 may further include an infrared cut-offfilter 80 and an image sensor 90. Further, the lens module 100 mayfurther include one or more stops. The lens module configured asdescribed above may have aberration characteristics respectively shownin FIG. 30.

FIG. 31 illustrates radii of curvature of the lenses, thicknesses of thelenses or distances between the lenses, refractive indices of thelenses, and Abbe numbers. In detail, values on a horizontal axiscorresponding to S1 in a vertical axis sequentially indicate a radius ofcurvature of an object-side surface of the first lens 10, a thickness ofthe first lens 10, a refractive index of the first lens 10, and an Abbenumber of the first lens 10. In addition, values on a horizontal axiscorresponding to S2 in the vertical axis sequentially indicate a radiusof curvature of an image-side surface of the first lens 10 and adistance between the first and second lenses 10 and 20. Similarly,values on a horizontal axis corresponding to S3 in the vertical axissequentially indicate a radius of curvature of an object-side surface ofthe second lens 20, a thickness of the second lens 20, a refractiveindex of the second lens 20, and an Abbe number of the second lens 20.In addition, values on a horizontal axis corresponding to S4 in thevertical axis sequentially indicate a radius of curvature of animage-side surface of the second lens 20 and a distance between thesecond and third lenses 20 and 30. For reference, radii of curvature ofthe third to seventh lenses, the thicknesses of the lenses or thedistances between the lenses, the refractive indices of the lenses, andthe Abbe numbers may be confirmed in the same manner as described above.

FIG. 32 illustrates aspherical surface coefficients of each lens. Morespecifically, in FIG. 32, a vertical axis indicates object-side surfacesand image-side surfaces of the lenses. For example, S1 in the verticalaxis indicates the object-side surface of the first lens 10, and S2 inthe vertical axis indicates the image-side surface of the first lens 10.In addition, S3 in the vertical axis indicates the object-side surfaceof the second lens 20, and S4 in the vertical axis indicates theimage-side surface of the second lens 20. Similarly, numbers S5 to S14in the vertical axis indicate object-side surfaces and image-sidesurfaces of the third to seventh lenses, respectively.

In the present exemplary embodiment, the first lens 10 may have positiverefractive power. In addition, the object-side surface of the first lens10 may be convex, and the image-side surface thereof may be concave. Thesecond lens 20 may have positive refractive power. In addition, bothsurfaces of the second lens 20 may be convex. The third lens 30 may havenegative refractive power. In addition, the object-side surface of thethird lens 30 may be convex, and the image-side surface thereof may beconcave. The fourth lens 40 may have positive refractive power. Inaddition, the object-side surface of the fourth lens 40 may be concave,and the image-side surface thereof may be convex. That is, the fourthlens 40 may have a meniscus shape in which it is convex toward an imageside. The fifth lens 50 may have positive refractive power. In addition,the object-side surface of the fifth lens 50 may be concave, and theimage-side surface thereof may be convex. That is, the fifth lens 50 mayhave a meniscus shape in which it is convex toward the image side. Thesixth lens 60 may have negative refractive power. In addition, theobject-side surface of the sixth lens 60 may be concave, and theimage-side surface thereof may be convex. That is, the sixth lens mayhave a meniscus shape in which it is convex toward the image side. Theseventh lens 70 may have negative refractive power. In addition, theobject-side surface of the seventh lens 70 may be convex, and theimage-side surface thereof may be concave. Further, the seventh lens 70may have a shape in which an inflection point is formed on theobject-side surface and the image-side surface thereof.

The lens modules according to first to eighth exemplary embodiments ofthe present disclosure configured as described above may satisfy all ofthe above-mentioned Conditional Equations as shown in Table 1.

TABLE 1 First Second Third Fourth Fifth Sixth Seventh Eighth ExemplaryExemplary Exemplary Exemplary Exemplary Exemplary Exemplary ExemplaryReference Embodiment Embodiment Embodiment Embodiment EmbodimentEmbodiment Embodiment Embodiment f1 12.57 9.41 12.14 13.99 13.79 14.1112.16 10.46 f2 3.83 4.40 3.91 3.73 3.64 3.75 3.69 3.81 f3 −5.37 −7.60−5.93 −5.57 −5.47 −5.76 −5.12 −4.74 f4 −50.02 −23.81 −50.21 −49.99−49.46 −50.02 −50.00 104.67 f5 32.43 −67.64 43.02 99.98 99.98 −104.0545.95 133.32 f6 −211.59 71.92 −73.47 104.12 100.26 50.16 −839.37 −78.39f7 −64.11 −31.72 −56.14 −73.21 −45.93 −131.23 −45.41 −54.59 V1 − V3 > 2032.80 32.80 32.80 32.80 32.80 32.80 32.80 32.80 V2 − V3 > 20 32.80 32.8032.80 32.80 32.80 32.80 32.80 32.80 (V1 + V2)/2 · V3 > 20 32.80 32.8032.80 32.80 32.80 32.80 32.80 32.80 f1 − f2 8.74 5.01 8.23 10.26 10.1510.35 8.49 6.65 d23/d67 0.59 0.59 0.59 0.59 0.59 0.59 0.59 0.59 d12 −d23 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003

As set forth above, according to exemplary embodiments of the presentdisclosure, aberration may be easily corrected and high resolution maybe implemented.

While exemplary embodiments have been shown and described above, it willbe apparent to those skilled in the art that modifications andvariations could be made without departing from the spirit and scope ofthe present disclosure as defined by the appended claims.

What is claimed is:
 1. A lens module comprising: a first lens havingpositive refractive power; a second lens having positive refractivepower; a third lens having negative refractive power; a fourth lenshaving refractive power; a fifth lens having refractive power; a sixthlens having positive refractive power; and a seventh lens havingrefractive power of which an object-side surface is convex and one ormore inflection points formed in locations thereof not crossing anoptical axis, wherein the first lens, the second lens, the third lens,the fourth lens, the fifth lens, the sixth lens and the seventh lens aredisposed in a sequential order from the first lens to the seventh lens.2. The lens module of claim 1, wherein the fourth lens has negativerefractive power.
 3. The lens module of claim 1, wherein the seventhlens has negative refractive power.
 4. The lens module of claim 1,wherein an object-side surface of the first lens is convex, and animage-side surface thereof is concave.
 5. The lens module of claim 1,wherein both surfaces of the second lens are convex.
 6. The lens moduleof claim 1, wherein an image-side surface of the third lens is concave.7. The lens module of claim 1, wherein an object-side surface of thesixth lens is concave, and an image-side surface thereof is convex. 8.The lens module of claim 1, wherein an image-side surface thereof isconcave.
 9. The lens module of claim 1, wherein it satisfies thefollowing Conditional Equation:V1−V3>20  [Conditional Equation] where V1 is an Abbe number of the firstlens, and V3 is an Abbe number of the third lens.
 10. The lens module ofclaim 1, wherein it satisfies the following Conditional Equation:V2−V3>20  [Conditional Equation] where V2 is an Abbe number of thesecond lens, and V3 is an Abbe number of the third lens.
 11. The lensmodule of claim 1, wherein it satisfies the following ConditionalEquation:f1>f2  [Conditional Equation] where f1 is a focal length of the firstlens, and f2 is a focal length of the second lens.
 12. The lens moduleof claim 1, wherein it satisfies the following Conditional Equation:D12>D23  [Conditional Equation] where D12 is a distance from animage-side surface of the first lens to an object-side surface of thesecond lens, and D23 is a distance from an image-side surface of thesecond lens to an object-side surface of the third lens.